Function instr_get_interrupt_number 

pub unsafe extern "C" fn instr_get_interrupt_number(
    instr: *mut instr_t,
) -> c_int

Assumes that \p instr’s opcode is OP_int and that either \p instr’s operands or its raw bits are valid. Returns the first source operand if \p instr’s operands are valid, else if \p instr’s raw bits are valid returns the first raw byte.